IS 17439:2020
Polyphosphoric acids for industrial use
BIS QCO · ISI MARK · 1 LINES · CHEMICALS AND PETROCHEMICALS QUALITY CONTROL ORDER, NOTIFIED VIDE S.O. 5388(E)
IS 17439 specifies the requirements for technical-grade polyphosphoric acid supplied to the fertiliser, detergent, water-treatment and intermediate-chemical industries. The standard governs total phosphorus pentoxide content, average chain length, viscosity, colour, iron content and moisture for industrial-grade material.
At a glance
1
Tariff lines covered (8-digit HSN)
Chapter 28
Primary HSN chapter
ISI
Mark scheme
Chemicals and Petrochemicals Quality Control Order, notified vide S.O. 5388(E)
Governing Quality Control Order
Tariff lines covered
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Speak to an Expert Last verified against gazette notifications: 2026-05-16. Source: BIS / Indian Customs CUSDATA.
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